#Lab Solution

The Helm chart has multiple layers of issues that need to be resolved in sequence.

You can make changes in the labs/troubleshooting-3/specs/app-chart folder and apply them with the same Helm command:

helm upgrade --install broken-app labs/troubleshooting-3/specs/app-chart/ --create-namespace --namespace troubleshooting-3

#Phase 1: Helm Template Issues

The chart won't install successfully due to template problems:

1. Web Deployment selector mismatch:
1. Selector: app: {{ .Release.Name }}-frontend
2. Pod labels: app: {{ .Release.Name }}-web
3. Fix: Change selector to match pod labels

1. Template syntax incorrect:
1. ingress-nodeport.yaml file has incorrect whitepace
2. {{ - if ... }} and {{ - end }} should not have a space before the hyphen

#Phase 2: StatefulSet Issues (after Helm installs)

Only the web Pods are running.

kubectl -n troubleshooting-3 describe sts

1. Volume mount vs claim template name mismatch:
1. volumeMount name: db-storage
2. volumeClaimTemplate name: postgres-data
3. Fix: Make the names match

#Phase 3: Ingress Access Issues (after StatefulSet works)

1. Service mismatch:
1. Ingress binds to {{ .Release.Name }}-web-service
2. Fix: Change to {{ .Release.Name }}-web-svc

#Apply the Fixed Chart

You can replace the broken deployment with a fixed chart:

helm uninstall broken-app -n troubleshooting-3

helm upgrade --install fixed-app labs/troubleshooting-3/solution/app-chart/ --create-namespace --namespace troubleshooting-3

#Verify Everything Works

# Check all resources
kubectl get pods,svc,ing,pvc -n troubleshooting-3

# Test the web app through ingress
curl http://whoami.local:8000

# Verify Helm deployment
helm list -n troubleshooting-app
helm get values fixed-app -n troubleshooting-app